i got new headlights from my parts truck since one of my original headlights caught on fire my truck is leveled out so i need to adjust the headlights angle down so i don't blind other drivers, i tried to do this with a 4mm socket and the socket just started to knock the sholders off of the adjuster bolt, is there an easy way to do this?

if not then keep in mind that i am good with a welder, sawzall, grinder, torch, and have a HUGE hammer